Photographic element containing an azopyrazolone masking coupler

Details Photographic element containing an azopyrazolone masking coupler Photographic element containing an azopyrazolone masking coupler

1995-10-05

1997-01-07

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430551, 430555, 430558, G03C 7333, G03C 738, G03C 7392

Patent

active

055915698

ABSTRACT:
This invention provides a photographic process and element where the element comprises a support bearing a light-sensitive photographic silver halide layer containing (1) a bicyclic azole coupler, (2) an azopyrazolone masking coupler, and (3) an aromatic electron-rich compound having ring substituents for which the sum of the individual Hammett sigma-para values is more negative than -0.80.

REFERENCES:
patent: 4977072 (1990-12-01), Renner et al.
patent: 5006454 (1991-04-01), Sasaki et al.
patent: 5068172 (1991-11-01), Seto et al.
patent: 5219719 (1993-06-01), Kida
patent: 5270156 (1995-12-01), Hirabayashi

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